Door lock



Jan. 25, 1955 P. KosEl. 2,700,292

' DOOR Lock Filed Sept. 22, 1953 2 Sheets-Sheet l ATTE RN EYS Jan. 25, 1955 p, KQSEL 2,700,292v

` DOOR LOCK Filed Sept. 22, 1953 2 Sheets-Sheet 2 INVENTOR.

5 f@ I 22 Paalliasel 22 2 JZ l e' w ATTDRNEYS DOOR LOCK Paul Kosel, Mound City, S. Dak.

Application September 22, 1953, Serial No. 381,682

Claims. (Cl. 70-150) This invention relates to a door latch or lock.

The object of the invention is to provide a door lock which is ruggedly constructed, closes easily, and wherein there is provided a mechanism for preventing accidental opening of the lock.

A further object of the invention is to provide a door lock which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure 1 is a front elevational view of the door lock, constructed according to the present'invention, and looking at'the outside of the door.

Figure 2 is a view looking at the opposite side of the door from Figure l and showing the inner surface of the door.

Figure 3 is an end elevational viewl of the door lock and with the lock in latched'position.

Figure 4 is a side elevational. view of the door lock, and showing thedoor frame and door in section.

Figure 5 is a sectional view taken through the door lock.

Figure. 6 is. a View similar to Figure 5 but. showing the parts in shifted position as when the door is being opened or closed.

Figure 7 is a sectional view taken on the line 7 7 of Figure 5.

Figure 8 is a sectional View taken on the line 8--8 of Figure 5.

Figure 9 is a sectional view taken on the line 9 9 of Figure 6.

Figure l0 is a perspective view of the locking dog.

Referring in detail to the drawings, the numeral 10 designates a portion of a stationary door frame, Figure 4, and mounted for movement toward and away from said door frame 10 is a door 9 which can be of any suitable or desired construction. A bracket 12 is secured to the door fri-ame 10 by suitable securing elements such as screws 14, Figure 3, and the frame 10 is provided with an inclined recess or cutout 11. The bracket 12 has a lip 15 which extends into the cutout 11 to provide a track or guideway for a purpose to be later described. The movable door 9 is provided with a recess or cutout 16, Figure 4, and the recess 16 serves to receive a portion of the door frame l0 when the door 9 is in closed position.

The lock `of the present invention further includes a plate 17 which is adapted to be arranged contiguous to the outside of the door 9. Arranged contiguous to the A inside of the door 9 is a housing 18 which can be made of any suitable material, and the housing 18 includes a back wall 19 and a cover 20 which is detachably connected to the housing. A plurality of securing elements such as bolts 21 extend through the plate 17 and through A the housing .18 and through the cover 20, Figure 8. A nut 22 may be arranged in threaded engagement with each of the bolts 21 for maintaining the parts in their proper assembled relation, the bolts 21 also extending through the door 9.

There is further provided a keeper 23 which is rotatably mounted in the assembly, and the keeper 23 includes a shaft portion 24 which has a suitable handle 25 secured to an end thereof in any suitable manner, as for example by means of a pin 26. The handle 25 is arranged on the outside of the door 9 and can be used for at times un- United States Patent ice locking the door to permit the door to be readily opened. Extending from the shaft 24 and secured thereto or formed integral therewith is a transverse finger 27, and the nger 27 is provided with a notch 28, Figure 5. The outer end of the shaft 24 is shaped to provide an arm 29 which is arranged at right angles with respect to the shaft, and a suitable roller 30 is connected to a reduced diameter portion of the arm 29 by a suitable securing element such as a screw assembly 31, Figure 4. The roller 30 is adapted to engage the bracket 12 and pass through the recess 11 when the door is being opened and closed, and the roller 30 engages the lip 15 on the bracket 12 to insure that the door opens quickly and smoothly and also insures that the door closes easily'and quickly.

The housing 18 further includes spaced parallel walls 32 and 33, and extending between the walls 32 and 33 are lwalls 34 and 35, Figures 5 and 6.

The plate 17 is provided with a keyhole 37 which registers with a keyhole in the door 9, and these holes also register with a keyhole or slot 38 in the back member 19. A suitable key 39 may be extended through these registering slots or holes and the key 39 can be used for unlocking the door from the outside. A suitable circular hole or opening 4l) may be provided in the cover 20 for receiving'an end of the key 39 or to act as a guide for the key during its turning movement. A block 36 is secured within the housing 18, Figure 6, and the block 36 provides a stop member toy be engaged by the .finger 27 to limit rotary movement of the keeper 23. A coil spring 41'interconnects or extends between the nger 27 andthe wall 34 of the housing 18.

The lock of the present invention further includes a dog 42, Figure 10, and the dog. 42 has a V-shaped slot 43 in one end thereof which is adapted to be engaged by the key 39 so that by rotating. the key 39 in the proper direction the key will engage the slot 43 to thereby rotate or move the dog 42 from a locked to an unlocking position. The dog 42 is provided with a cutout 44 which denes a nose 451 that is adapted to engage in the notch 28 in the iingery 27 .as shown inv Figure 5. The nose 45 is mounted for movement into and out of engagement with the. notchv 28. The dog 42. also has an opening 46 through which extends a pivot pins 47 so as to permit the dog 42 to swing or rotate on an axis about the pivot pin 47. A finger engaging lug 48 extends from an end of the dog 42, and the lug 48 extends through a slot 49 in the wall 35 of the housing. The lug 48 is adapted to be manually moved when the dog 42 is to be moved to a locking or unlocking position, and the lug 48 is adapted to be actuated from the inside of the building.

A means is provided for maintaining the dog 42 irnmobile in either its locked or unlocked position, and this means comprises an arcuate or curved ear 50 which is secured to the dog 42. The ear 50 is provided with a slot 51, and a suitable securing element such as a pin 52 has a portion thereof extending slidably through the slot 51. The other end of the pin 52 is pivotally connected to an eyelet 53 which is secured to the wall 35, and a coil spring 54 is circumposed on the pin 52, Figure 5.

From the foregoing it is apparent that a door lock has been provided which is ruggedly constructed and which will insure that the door closes easily or opens easily and smoothly. In Figures 1 through 5 the door lock is shown in locked position so that the nose 45 is seated in the notch 28 of the finger 27, Figure 5. To unlock the door the parts must be moved from the position shown in Figure 5 to the position shown in Figure 6 and this can be accomplished in several ways. One way of unlocking the door is to move the finger engaging lug 48 from right to left as shown in Figure 6 and since the lug 48 is secured to an end of the dog 42, this will cause pivotal movement of the dog 42 about the pivot pin 47 so that the nose 45 will be moved out of engagement with the notch 28. Then by manually gripping the handle 25, the keeper 23 can be rotated until the roller 30 registers with the cutout 11 in the door frame so that the door can be opened since the roller 30 will pass through the cutout 11. When the keeper 23 is moved to unlocking position the coil spring 41 is stretched so that it will be seen that the coil spring 41 has a normal tendency to maintain the keeper in locking position.

Another way of unlocking the door is to insert the key 39 through ythe keyholes 38 and 37 and then rotating the key until it engages in the V-shaped slot 43 in the dog 42. Thus, the key can be used to pivot the dog 42 from the position shown in Figure 5 4to the position shown in Figure 6 whereby the door will be free to open, The spring 54 on the pin 52 serves to prevent accidental pivoting movement of the dog 42 but it is to be understood that the dog 42 can be pivoted if suicient pressure is applied thereto since the spring 54 can becompressed somewhat. With the parts in the position shown in Figure 5, the nose 45 of the dog 42 prevents rotation of the finger 27 and consequently of the keeper 23, and accidental pivoting movement of the dog 42 is prevented bythe coil spring 54 on the pin 52,

The roller 30 insures that the door will ope'n and close easily and the lug 48 can be used for locking the door from the inside of the building. The key 39 is inserted from the outside of the building.

I claim:

l. In a locking mechanism, a door frame provided with an inclined cutout, a door mounted for movement toward and away from said frame and provided with a recess for receiving a portion of the door frame when the door is in closed position, a housing secured to the inside of said door and including a back wall, spaced parallel end walls, and spaced parallel side walls, a cover detachably connected to said housing, a plate secured to the outside of said door, a keeper including a shaft rotatably mounted in said housing, a handle mounted on the outer end of said shaft contiguous to said plate, a block secured to the back wall of said housing providing a stop member, a linger arranged at right angles with respect to said shaft and secured thereto, said nger adapted to engage said block, said nger having a notch therein, resilient means for connecting said finger to a wall of said housing, a dog pivotally mounted in said housing and having a nose mounted for movement into and out of engagement with the notch in said finger, an arm extending transversely with respect to the inner end of said shaft, and a roller mounted on the end of said arm for movement through the cutout in said frame.

2. The apparatus as described in claim 1, wherein an end of said dog is provided with a V-shaped slot for engagement by a key.

3. The apparatus as described in claim 1, and further including a linger engaging lug extending from an end of said dog.

4. The apparatus as described in claim 1, and further including means for maintaining said dog immobile in its adjusted positions.

5. In a locking mechanism, a door frame provided with an inclined cutout, a door mounted for movement toward and away from said frame and provided with a recess for receiving a portion of the door frame when the door is in closed position, a housing secured to the inside of said door and including a back wall, spaced parallel end walls, and spaced parallel side walls, a cover detachably connected to said housing, a plate secured to the outside of said door, a keeper including a shaft rotatably mounted in said housing, a handle mounted on the outer end of said shaft contiguous to said plate, a block secured to the back Wall of said housing providing a stop member, a finger arranged at right angles with respect to said shaft and secured thereto, said finger adapted to engage said block, said nger having a notch therein, resilient means for connecting said nger to a wall of said housing, a dog pivotally mounted in said housing and having a nose mounted for movement into and out of engagement with the notch in said nger, an arm extending transversely with respect to the inner end of said shaft, and a roller mounted on the end of said arm for movement through the cutout in said frame, there being a V-shaped slot in one end of said dog, for engagement by a key, a linger engaging lug extending from the other end of said dog, and means for maintaining said dog immoble in its adjusted positions, said means comprising an arcuate ear secured to said dog and provided with a slit, a

securing element pivotally connected to a wall of said` housing and eigtending through the slit in said ear, and a coil spring clrcumposed on said securing element.

References Cited in the tile of this patent UNITED STATES PATENTS 174,685 Klemn Mar. 14, 1876 822,000 George May 29, 1906 915,576 Fairbank Mar. 16, 1909 1,120,943 Kirn Dec. 15, 1914 1,880,929 Ekman Oct. 4, 1932 2,094,547 McCulloch et al. Sept. 28, 1937 

